What is the main purpose of an aircraft's hydraulic system?

The hydraulic system of an aircraft is primarily designed to provide a means of transmitting force and motion within various systems, most notably the flight control systems. This involves using hydraulic fluid to transfer power, allowing pilots to control surfaces such as ailerons, elevators, rudders, and in some cases, landing gear and brakes, with relative ease compared to mechanical systems. The hydraulic system is integral for the operation of these critical components, enhancing the responsiveness and efficiency of the flight controls.

By enabling smooth and powerful actuation of these systems, the hydraulic mechanism plays a vital role in ensuring safe maneuverability of the aircraft during all phases of flight. Therefore, the key purpose of the hydraulic system is to activate and control the flight control systems, making them essential for effective aircraft operation.